—What do you think of modern music?

—It is often considered not as good as ________ of the past.

A．it

B．that

C．this

D．one

下列情形不适用于《政府采购法》的是______。

A．对因严重危害自然灾害和其他不可抗力事件所实施的紧急采购

B．涉及国家安全和秘密的采购

C．军事采购

D．中央政府采购办公用品